Tacx Neo 2T and 26" MTB compatibility

Hello.

My 1st (but nor last) post here, sorry for my high school English. No one has answered me in my Spanish forum foromtb, so I'll try here.

In a few days and receiving a tacx neo 2T. I have a good 29" mtb and good but old 26" mtb. The idea is to mount the 26” to the turbo trainer but I'm afraid it isn't possible or maybe the bike stay too raised from behind. Besides, the axis it's one of those olds whith two springs in each end.

Some advice?

Thank you in advance.

Happy to be part of this forum.